New Hybrid Technology for Fast Laser Gas Analysis in High Dust Processes

Abstract

A gas analysis system for high dust applications was successfully tested at a cement plant at the exit of a dedusting cyclone. The response time was 5 s in a process gas stream with up to 200 g/m3 of dust. The test employed a new hybrid gas analysis solution that combines in situ and extractive gas analysis technologies. The test confirmed that a hybrid gas analysis system can provide a reliable and rapid measurement response which is critical in process streams with potentially explosive or toxic gases. The rapid response provides improved operational safety and can enable less conservative process interlock levels. This can reduce the process upsets caused by interlock trips, particularly where gases such as CO, CH4, and NH3 are involved. It will also provide operators with a larger operational window for combustible management which is especially beneficial with Refuse-Derived Fuels (RDF) and tighter process control in Selective Non-Catalytic Reduction (SNCR) dosing operations.